Cuprite and Common Opal Physical Properties

Cuprite

Common Opal

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

5.85-6.15

1.98-2.50

1.5 Fracture

Conchoidal, Metallic, UnevenArthur Thomas, Gemstones (2009), Brittle, Conchoidal

Conchoidal, Conchoidal, Gemstones of the world (2001)

1.6 Cleavage

Fair in four directions forming octahedrons

Not Available

1.7 Mohs Hardness

3.5-4

5.5-6.5

1.8 Chemical Composition

Cu 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)

Cuprite and Common Opal Chemical Formula

While comparing Cuprite and Common Opal physical properties, the important data you should know is its chemical composition. Since chemical formula defines the molecular structure of the crystal, most of the physical properties like color, tenacity, solubility are governed by Cuprite and Common Opal chemical formula.

Chemical formula of Cuprite- Cu 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Common Opal- SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)

Compare Red Gemstones

Cuprite Vs Franklinite

Cuprite Vs Fluorite

Cuprite Vs Friedelite

Cuprite and Common Opal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Cuprite and Common Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cuprite and Common Opal Optical Properties during the identification of gemstone. Specific gravity of Cuprite is 1.98-2.50 whereas that of Common Opal is 1.98-2.50.